Dynamic netvm switching doesn't work

[marmarek]

Reported by joanna on 8 Mar 2012 23:28 UTC
After one changes e.g. the netvm used by the firewallvm, the networking works for some time (a few tens of secconds), and then stops. Probably some f/w related issue?

Migrated-From: https://wiki.qubes-os.org/ticket/478

[marmarek]

Comment by marmarek on 9 Mar 2012 00:55 UTC
Here is essential patch:
http://git.qubes-os.org/gitweb/?p=marmarek/core.git;a=commit;h=9547b191ade0f5d836859a0179b8e582a786c6e1

But also fixed problems mentioned in #465, making easier use it in qubes-manager (setter in netvm property)

[marmarek]

Comment by marmarek on 9 Mar 2012 00:55 UTC
Here is essential patch:
http://git.qubes-os.org/gitweb/?p=marmarek/core.git;a=commit;h=9547b191ade0f5d836859a0179b8e582a786c6e1

But also fixed problems mentioned in #465, making easier use it in qubes-manager (setter in netvm property)

[marmarek]

Comment by joanna on 9 Mar 2012 10:16 UTC
Still doesn't work!

Dom0: core 2.0.8
F/w VM: core 1.7.17

[marmarek]

Comment by joanna on 9 Mar 2012 10:16 UTC
Still doesn't work!

Dom0: core 2.0.8
F/w VM: core 1.7.17

[marmarek]

Modified by marmarek on 9 Mar 2012 10:20 UTC

[marmarek]

Modified by marmarek on 9 Mar 2012 10:20 UTC

[marmarek]

Comment by marmarek on 9 Mar 2012 10:21 UTC
Can you provide:

1. routing table from fw (also -t nat)
2. routing table from new netvm
3. firewall from fw
4. /etc/resolv.conf from fw

[marmarek]

Comment by marmarek on 9 Mar 2012 10:21 UTC
Can you provide:

1. routing table from fw (also -t nat)
2. routing table from new netvm
3. firewall from fw
4. /etc/resolv.conf from fw

[marmarek]

Comment by marmarek on 16 Mar 2012 11:33 UTC
Found that it is caused by DNAT rules in PR-QBS chain, looks like bug in kernel (iptables).
Next step: check if it is fixed in 3.2.x (on my system it works on 3.2.5).

[marmarek]

Comment by marmarek on 16 Mar 2012 11:33 UTC
Found that it is caused by DNAT rules in PR-QBS chain, looks like bug in kernel (iptables).
Next step: check if it is fixed in 3.2.x (on my system it works on 3.2.5).

[marmarek]

Comment by joanna on 12 Apr 2012 09:35 UTC
This seems to be a problem with my USB driver. The netvm switching does work when I have a different NICs assigned in the netvms. So, seems Qubes-irrelevant. Will try some newer VM kernel, which should solve it.

[marmarek]

Comment by joanna on 12 Apr 2012 09:35 UTC
This seems to be a problem with my USB driver. The netvm switching does work when I have a different NICs assigned in the netvms. So, seems Qubes-irrelevant. Will try some newer VM kernel, which should solve it.

[marmarek]

Comment by joanna on 26 May 2012 11:09 UTC
After all, it turned out to be a problem with Xen net backend -- it was just that the usb modem I was using was apparently triggering this bug:

http://lists.xen.org/archives/html/xen-devel/2012-05/msg01878.html
http://lists.xen.org/archives/html/xen-devel/2012-05/msg01133.html

[marmarek]

Comment by joanna on 26 May 2012 11:09 UTC
After all, it turned out to be a problem with Xen net backend -- it was just that the usb modem I was using was apparently triggering this bug:

http://lists.xen.org/archives/html/xen-devel/2012-05/msg01878.html
http://lists.xen.org/archives/html/xen-devel/2012-05/msg01133.html